If you're looking for similar to Guilty Crown: Lost Christmas, you might like these titles. All recommendations are made by Anime-Planet users like you!
When the state of SEAUn brings the Sibyl System in to test its effectiveness, it becomes a haven of peace and safety—for a time. Eventually, terrorists from SEAUn begin appearing in Japan, somehow slipping through the System’s security and attacking from within. Desperate for answers, Inspector Akane Tsunemori is sent overseas to bring the terrorists to justice. But when her investigation forces her into a standoff with an old ally, will she be able to pull the trigger?